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-rw-r--r--mdk-stage1/dietlibc/sparc/__longjmp.S67
1 files changed, 0 insertions, 67 deletions
diff --git a/mdk-stage1/dietlibc/sparc/__longjmp.S b/mdk-stage1/dietlibc/sparc/__longjmp.S
deleted file mode 100644
index 72e001a2f..000000000
--- a/mdk-stage1/dietlibc/sparc/__longjmp.S
+++ /dev/null
@@ -1,67 +0,0 @@
-#include <setjmp.h>
-
-#define JB_SP 0
-#define JB_FP 1
-#define JB_PC 2
-
-#define ENV(base,reg) [%base + (reg * 4)]
-#define ST_FLUSH_WINDOWS 3
-#define RW_FP [%fp + 0x48]
-
-.text
-.global __longjmp
-__longjmp:
- /* Store our arguments in global registers so we can still
- use them while unwinding frames and their register windows. */
-
- ld ENV(o0,JB_FP), %g3 /* Cache target FP in register %g3. */
- mov %o0, %g1 /* ENV in %g1 */
- orcc %o1, %g0, %g2 /* VAL in %g2 */
- be,a 0f /* Branch if zero; else skip delay slot. */
- mov 1, %g2 /* Delay slot only hit if zero: VAL = 1. */
-0:
- xor %fp, %g3, %o0
- add %fp, 512, %o1
- andncc %o0, 4095, %o0
- bne .Lthread
- cmp %o1, %g3
- bl .Lthread
-
- /* Now we will loop, unwinding the register windows up the stack
- until the restored %fp value matches the target value in %g3. */
-
-.Lloop:
- cmp %fp, %g3 /* Have we reached the target frame? */
- bl,a .Lloop /* Loop while current fp is below target. */
- restore /* Unwind register window in delay slot. */
- be,a .Lfound /* Better have hit it exactly. */
- ld ENV(g1,JB_SP), %o0 /* Delay slot: extract target SP. */
-
-.Lthread:
- /*
- * Do a "flush register windows trap". The trap handler in the
- * kernel writes all the register windows to their stack slots, and
- * marks them all as invalid (needing to be sucked up from the
- * stack when used). This ensures that all information needed to
- * unwind to these callers is in memory, not in the register
- * windows.
- */
- ta ST_FLUSH_WINDOWS
- ld ENV(g1,JB_PC), %o7 /* Set return PC. */
- ld ENV(g1,JB_SP), %fp /* Set saved SP on restore below. */
- sub %fp, 64, %sp /* Allocate a register frame. */
- st %g3, RW_FP /* Set saved FP on restore below. */
- retl
- restore %g2, 0, %o0 /* Restore values from above register frame. */
-
-.Lfound:
- /* We have unwound register windows so %fp matches the target. */
- mov %o0, %sp /* OK, install new SP. */
-
-.Lsp_ok:
- ld ENV(g1,JB_PC), %o0 /* Extract target return PC. */
- jmp %o0 + 8 /* Return there. */
- mov %g2, %o0 /* Delay slot: set return value. */
-
-.size __longjmp, . - __longjmp
-